gnu: Add texlive-metrix.

* gnu/packages/tex.scm (texlive-metrix): New variable.

gnu: Add texlive-liturg.

* gnu/packages/tex.scm (texlive-liturg): New variable.

gnu: Add texlive-linguex.

* gnu/packages/tex.scm (texlive-linguex): New variable.

gnu: Add texlive-ling-macros.

* gnu/packages/tex.scm (texlive-ling-macros): New variable.

gnu: Add texlive-lexref.

* gnu/packages/tex.scm (texlive-lexref): New variable.

gnu: Add texlive-lexikon.

* gnu/packages/tex.scm (texlive-lexikon): New variable.

gnu: Add texlive-ledmac.

* gnu/packages/tex.scm (texlive-ledmac): New variable.

gnu: Add texlive-langnames.

* gnu/packages/tex.scm (texlive-langnames): New variable.

gnu: Add texlive-jurarsp.

* gnu/packages/tex.scm (texlive-jurarsp): New variable.

gnu: Add texlive-juramisc.

* gnu/packages/tex.scm (texlive-juramisc): New variable.

gnu: Add texlive-juraabbrev.

* gnu/packages/tex.scm (texlive-juraabbrev): New variable.

gnu: Add texlive-jura.

* gnu/packages/tex.scm (texlive-jura): New variable.

gnu: Add texlive-gmverse.

* gnu/packages/tex.scm (texlive-gmverse): New variable.

gnu: Add texlive-gb4e.

* gnu/packages/tex.scm (texlive-gb4e): New variable.

gnu: Add texlive-expex.

* gnu/packages/tex.scm (texlive-expex): New variable.

gnu: Add texlive-eledmac.

* gnu/packages/tex.scm (texlive-eledmac): New variable.

gnu: Add texlive-eledform.

* gnu/packages/tex.scm (texlive-eledform): New variable.

gnu: Add texlive-edfnotes.

* gnu/packages/tex.scm (texlive-edfnotes): New variable.

gnu: Add texlive-ecltree.

* gnu/packages/tex.scm (texlive-ecltree): New variable.

gnu: Add texlive-dvgloss.

* gnu/packages/tex.scm (texlive-dvgloss): New variable.